Precedence
- Precedence: Which of 2 different operators happens first?
3+4*5 (3+4)*5 or 3+(4*5)
3*4+5 (3*4)+5 or 3*(4+5)
- Parenthesis have the highest precedence
- * has more precedence than +
- * has the same precedence as /
Associativity & Ambiguity
- Associativity: which of 2 same operators happens first?
3-4-5 (3-4)-5 or 3-(4-5) - is left assoc
x=y=z (x=y)=z or x=(y=z) = is right assoc
2^3^4 (2^3)^4 or 2^(3^4) ^ is right assoc
3/4/5 (3/4)/5 or 3/(4/5) / is left assoc
Ambiguous: Grammar lets multiple trees happen for a program
